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Glossary > Photography >Barrel Distortion
Barrel Distortion
An image distortion caused by projecting onto a convex surface. For example, a grid projected on the outside of a dome has outwardly curved edges, where the centres curve out and the corners pull in. Single-axis barrel distortion occurs when projecting on the outside of a cylinder. The distortion can be alleviated using optical elements, electronic devices or software to counter-distort the image. The opposite of barrel distortion is called pincushioning.
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